Rear bumper for a vehicle



FIG. 1 is a perspective view of a rear bumper for a vehicle;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a rear view thereof.

The ornamental design for a rear bumper for a vehicle, as shown anddescribed.